Polyamide resin composition and moulded piece

FIELD: chemistry.

SUBSTANCE: invention refers to a polyamide resin composition containing polyamide consisting of a diamine chain containing 70 mole % or more of a paraxylylene diamine chain, and a dicarboxylic acid chain containing 70 mole % or more of aliphatic dicarboxylic acid chain with 6-18 carbon atoms, as well as (B) an aromatic compound of a seconday amine and (C) a sulphur organic compound. The composition contains from 0.05 to 5 weight portions of the sulphur organic compound and from 0.05 to 5 weight portions of the aromatic compound of the secondary amine per 100 weight fractions of polyamide. What is also described is a moulded piece made of the composition.

EFFECT: heat resistance, rigidity, high temperature applicability.

9 cl, 1 tbl, 13 ex

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to a polyamide resin composition, intended for obtaining a moulded product. The polyamide resin composition contains: (A) a polyamide, containing a unit of dicarboxylic acid and a diamine unit, including not less than 30 wt % of an m-xylenediamine unit, (B) a compound based on an aromatic secondary amine and (C) a compound on an organosulphuric base, where the mixed amount of the compound of the organosulphuric base (C) constitutes from 0.2 to 5 wt.p. counted per 100 wt.p. of the polyamide, and the weight ratio (B)/(C) in the polyamide resin composition is in the range from 0.1 to 5.0. The composition is characterised by a coefficient of oxygen-permeability not higher than 1 cm3·mm/m2·day·atm, at 23°C and 75% relative humidity (RH). Also described is the moulded product such as a hose or a pipe.

EFFECT: improved resistance to thermal ageing with the simultaneous preservation of permeability characteristics.

21 cl, 1 tbl, 23 ex

Polyamide resin // 2544013

FIELD: chemistry.

SUBSTANCE: invention relates to polyamide resin, method of its obtaining, to composition based on polyamide resin, as well as to moulded product. Polyamide resin includes units of diamine, containing 90 mol % or more paraxylenediamine and units of dicarboxylic acid, containing 90 mol % or more units of sebacic acid and/or units of azelaic acid. Polyamide resin has concentration of phosphorus atoms from 50 to 1000 ppm and YI value 10 or lower in colour difference test in accordance with JIS-K-7105. Method of obtaining polyamide resin includes stage of polycondensation in melt of diamine component, containing 90 mol % or more of paraxylenediamine and component based on dicarboxylic acid, containing 90 mol % or more sebacic acid and/or azelaic acid, in presence of compound, containing phosphorus atoms. Composition, used for obtaining moulded product, includes 100 wt. p. of said polyamide resin and from 0.01 to 2 wt. p. of nucleating agent.

EFFECT: invention makes it possible to obtain polyamide resin, possessing good heat resistance, water absorption resistance, chemical stability, high physical and mechanical properties, and at the same time forms little amount of gel, is characterised by good colour tone and mouldability.

14 cl, 6 tbl, 22 ex

FIELD: chemistry.

SUBSTANCE: invention relates to application of moulded component for contact with supercritical medium. Moulded component represents sleeve or tube and contains inner thermoplastic layer made of moulding mass. Moulding mass contains at least 50 wt % of components, wt. p.: a) from 0 to 99 of polyamide, obtained from combination of diamine and dicarboxylic acid, as well as ω-aminocarboxylic acid and respective lactam and b) from 1 to 100 of polyamide elastomer, selected from the group, including polyether/polyester-amide and polyetheramide, with the sum of weight parts of components a) and b) constituting 100. Moulding mass contains additional components, including minimum to 9 wt % of plasticiser.

EFFECT: absence or small content of plasticiser makes it possible to nearly completely eliminate increase of rigidity and longitudinal product shrinkage.

13 cl

FIELD: chemistry.

SUBSTANCE: invention relates to a polyamide resin composition, which has excellent properties, such as thermal stability, resistance to chemical impact, strength, wear resistance and mouldability, and therefore is widely applied for the production of moulded products as an engineering plastics. The polyamide resin composition includes: a polyamide (A), containing a unit, representing diamine and containing not less than 70 mol% of a unit, representing p-xylylenediamine, and a unit, representing dicarboxylic acid and containing not less than 70 mol% of a unit, representing a linear aliphatic dicarboxylic acid, which has from 6 to 18 carbon atoms; and a filling agent (B). The polyamide (A) includes a polyamide with the concentration of phosphorus atoms, constituting from 50 to 1000 ppm, and a value YI, which by results of differential colorimetric analysis in accordance with JIS-K-7105, does not exceed 10. The content of the filling agent (B) constitutes from 1 to 200 wt.p. counted per 100 wt.p. of the polyamide (A).

EFFECT: invention makes it possible to obtain the resin with better mouldability and the moulded products based on the said polyamide resin with better thermal stability, low water absorption, and excellent sliding properties.

20 cl, 4 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to composition based on polyamide resin for manufacturing moulded products. Composition contains polyamide, consisting of diamine units, containing units of 1,3-bis(aminomethyl)cyclohexane and units of dicarboxylic acid, including units of adipic and/or sebacic acid, (B) compounds of aromatic secondary amine, (C) organic sulphur-based compound and (D) phenolic oxidant. Weight ratio of components (B)/(C) in said composition constitutes from 0.5 to 10 and weigh ratio (D)/(C) in composition constitutes from 0.5 to 10. Polyamide resin-based composition is characterised by the fact that it has oxygen permeability coefficient not higher than 1.5 cubic cm·mm/m2.day·atm at temperature 23°C and relative humidity 75%. Moulded product, in particular hose or pipe is also described.

EFFECT: increased resistance to thermal ageing with preservation of gas-barrier properties of polyamides and products manufactured from them.

14 cl, 1 tbl, 16 ex

FIELD: chemistry.

SUBSTANCE: invention relates to fire-resistant compositions of polyamide resin. Claimed is a fire-resistant composition of the polyamide resin, including a polyamide (A), which contains a unit, representing diamine and containing not less than 70 mol% of a unit, representing p-xylylenediamine, and a unit, representing dicarboxylic acid and containing not less than 70 mol% of a unit, representing a linear aliphatic dicarboxylic acid, which has from 6 to 18 carbon atoms; an organohalogen compound (B), which serves as fire-protective means; an inorganic compound (C), which serves as auxiliary fire-protective means; and an inorganic filling agent (D), where the polyamide (A) includes a polyamide, which has the concentration of phosphorus atoms, constituting from 50 to 1000 ppm, and a value YI, which by results of differential colorimetric analysis in accordance with JIS-K-7105, does not exceed 10, and the content of the organohalogen compound (B), the content of the inorganic compound (C) and the content of the inorganic filling agent (D) constitutes from 1 to 100 wt.p. from 0.5 to 50 wt.p. and from 0 to 100 wt.p., respectively, counted per 100 wt.p. of the polyamide (A). Also claimed is the moulded product from the said composition.

EFFECT: composition has excellent mouldability, mechanical properties, heat resistance and low water absorption.

15 cl, 4 tbl, 21 ex

FIELD: chemistry.

SUBSTANCE: invention relates to polymer films, intended for application in field of electrical engineering, in particular, as carrier of flexible printed circuit boards. Described is subjected to biaxial stretching polymer film, obtained from polyamide composition, which contains at least 80 wt % counted per the total weight of polymer composition of semi-crystalline semi-aromatic polyamide, which has melt temperature (Tm), equal to at least 300°C. Polymer film is characterised by average coefficient of thermal expansion in plane in temperature range 20°C-Tg, measured in plane by method, corresponding to ASTM D969-08, and equal, to at least, 40 ppm/K. Semi-crystalline semi-aromatic polyamide contains repeating units, produced from dicarboxylic acid, consisting of 70-100 mol. % of terephthalic acid, diamines, and other repeating units in quantity 0-5 mol. %. Also described is method of polymer film obtaining, application of polymer film as belt carrier in production of printed circuit boards, as flexible carrier. Flexible printing board, electronic system or printed circuit board in assembly is described.

EFFECT: stability of geometric dimensions, resistance to high temperature and good dielectric properties of polymer films.

13 cl, 2 tbl, 2 ex

Copolyamides // 2533377

FIELD: chemistry.

SUBSTANCE: copolyamide includes units resulting from a reaction of polycondensation of the following precursors: terephthalic acid (a), aliphatic diamine (b), including x carbon atoms, where x represents an integer number between 6 and 22, and aminocarboxylic acid and/or lactam (c). Aminocarboxylic acid and/or lactam includes a basic chain and, at least, one linear or branched alkyl branching, with the total number of carbon atoms being equal to a value between 12 and 36. The method of the copolyamide obtaining consists in the fact that polycondensation of the precursors (a), (b), (c) is carried out. The composition includes, at least, one copolyamide.

EFFECT: invention makes it possible to obtain the copolyamide with high melting temperature and good flexibility, increase the copolyamide plasticity and impact strength.

30 cl, 3 tbl

Polyamide resin // 2525311

FIELD: chemistry.

SUBSTANCE: invention relates to polyamide resin, suitable for application in production of articles of industrial and household purpose, such as automobile components, components of electrotechnical and electronic equipment, components of machines. Polyamide resin is obtained by polycondensation of diamine component and component based on dicarboxylic acid, where 70 mol.% or more of diamine component represent p-xilylene diamine of constituting units, component based on dicarboxylic acid represents aliphatic dicarboxylic acid, containing from 6 to 18 carbon atoms. Polyamide resin has number average molecular weight Mn from 10000 to 50000 and degree of dispersity, expressed as Mn/Mw= weight average molecular weight/number average molecular weight, satisfying the following formula (1): 1.5≤(Mw/Mn)≤6.0(1) where Mn and Mw are determined by gel-penetrating chromatography GPC, with polyamide resin having molar balance with excess of carboxylic acid. Also described is composition, based on polyamide resin, used for obtaining moulded articles.

EFFECT: particularly high ability of moulding and processing, high heat resistance, low water absorption, high chemical resistance and good physical-mechanical properties.

5 cl, 2 tbl, 10 ex

FIELD: chemistry.

SUBSTANCE: invention relates to copolyamide, method of its obtaining, to polyamide-containing composition, application of polyamide and hypophosphorous acid or, at least, one of its salts. Copolyamide contains, at least, two links, corresponding to the following general formula: A/10.T. A is selected from the link, obtained from amino acid, link, obtained from lactam, and link, corresponding to the formula (Ca-diamine).(bibasic Cb-cycloaliphatic acid), where a stands for the number of diamine carbon atoms and b stands for the number of carbon atoms of bibasic acid. Each of a and b is in the range from 4 to 36. 10.T stands for the link, obtained as a result of polycondensatuon of 1,10-decandiamine and terephthalic acid. Copolyamide has polydispersion coefficient, measured by the method of gel permeation chromatography, denotes as lp, lower or equal to 3.5. Method of copolyamide obtaining lies in the following: stage of polycondensation of the following comonomers of monomer, resulting in A link, 1,10-decandiamine, and terephthalic acid, and optionally monomer, resulting in Z link, is carried out. polycondensation is carried out in presence of hypophosphorous acid or, at least, one of its salts in the amount in the range from 0.05 to 3.00 wt % with respect to the total weight of monomers. Application of hypophosphorous acid makes it possible to obtain polydispersion coefficient lower or equal to 3.5. Copolyamide is applied in form of powder, granulated products, monolayer structure, or, at least, one layer of multi-layer structure as additive and/or filling agent with improved thermal resistance. Such copolyamide is used in composition, which contains, at least, one additive, selected from filling agents, glass fibre, dyes, stabilisers, in particular UV-stabilisers, plasticisers, shock resistance modifiers surface active substances, pigments, bleaches, antioxidants, natural waxes, polyolefins and their mixtures.

EFFECT: invention makes it possible to obtain copolyamide with improved mechanical properties and shock resistance.

17 cl, 2 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a polyamide resin composition, intended for obtaining a moulded product. The polyamide resin composition contains: (A) a polyamide, containing a unit of dicarboxylic acid and a diamine unit, including not less than 30 wt % of an m-xylenediamine unit, (B) a compound based on an aromatic secondary amine and (C) a compound on an organosulphuric base, where the mixed amount of the compound of the organosulphuric base (C) constitutes from 0.2 to 5 wt.p. counted per 100 wt.p. of the polyamide, and the weight ratio (B)/(C) in the polyamide resin composition is in the range from 0.1 to 5.0. The composition is characterised by a coefficient of oxygen-permeability not higher than 1 cm3·mm/m2·day·atm, at 23°C and 75% relative humidity (RH). Also described is the moulded product such as a hose or a pipe.

EFFECT: improved resistance to thermal ageing with the simultaneous preservation of permeability characteristics.

21 cl, 1 tbl, 23 ex

FIELD: chemistry.

SUBSTANCE: invention relates to composition based on polyamide resin for manufacturing moulded products. Composition contains polyamide, consisting of diamine units, containing units of 1,3-bis(aminomethyl)cyclohexane and units of dicarboxylic acid, including units of adipic and/or sebacic acid, (B) compounds of aromatic secondary amine, (C) organic sulphur-based compound and (D) phenolic oxidant. Weight ratio of components (B)/(C) in said composition constitutes from 0.5 to 10 and weigh ratio (D)/(C) in composition constitutes from 0.5 to 10. Polyamide resin-based composition is characterised by the fact that it has oxygen permeability coefficient not higher than 1.5 cubic cm·mm/m2.day·atm at temperature 23°C and relative humidity 75%. Moulded product, in particular hose or pipe is also described.

EFFECT: increased resistance to thermal ageing with preservation of gas-barrier properties of polyamides and products manufactured from them.

14 cl, 1 tbl, 16 ex

FIELD: chemistry.

SUBSTANCE: invention relates to rubber mixture for production of pneumatic tyres. Rubber mixture contains, at least, one vulcanising diene caoutchouc, 35-300 parts of, at least, one active filling agent, selected from soot, silicon dioxide, filling agents, based on silicon and metal oxides, from 0.1·10-3 to 42·10-3 moles per a hundred parts of vulcanising agent caoutchouc, which is cross-linked with functionality higher than 4, and from 0.1 to 20 parts of, at least, one vulcanisation accelerator. Vulcanising agent has sulphur-containing structure, including hydrocarbon and/or heterohydrocarbon, and/or siloxane group, with functionality higher than 4. Soot or silicon dioxide, or their combination constitutes, at least, 10 parts of active filling agents. Mixture also contains 0-250 parts of other additional additives. Said rubber mixture has glass-transition temperature Tg (E" max.) in accordance with DIN 53 513, at least -80°C and not higher than 0°C.

EFFECT: tyres, manufactured with application of said mixture possess Shore A hardness in accordance with DIN 53 505 and ASTM D2240 not less than 40 ShA and not higher than 95 ShA with specified temperature range from -80°C to +80°C and specified compression of about 10+0,2% at 10 Hz.

12 cl, 2 dwg, 6 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a rubber mixture, particularly for vehicle tyres. The rubber mixture contains 30-100 pts.wt of at least one diene rubber per 100 pts.wt rubber, 20-200 pts.wt of at least one filler per 100 pts.wt rubber, 0-200 pts.wt, of additional additives per 100 pts.wt rubber, a sulphur-containing vulcanisation system which includes free sulphur, a sulphur donor and silane, with sulphur concentration due to said ingredients between 0.025 and 0.08 mol per 100 pts.wt rubber, of which elementary sulphur accounts for 0-70%, the sulphur donor accounts for 5-30% and the silane accounts for 20-95%, and 0.1-10 pts.wt of at least one vulcanisation accelerator per 100 pts.wt rubber.

EFFECT: invention improves wearing characteristics of a vulcanised rubber mixture.

22 cl, 11 tbl, 27 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a bituminous composition for use in the field of bitumen, road construction and industry. The bituminous composition comprises a larger portion of at least one bitumen and a smaller portion of at least one chemical additive. The additive is an organogelling agent which creates a network of hydrogen bonds between gelling molecules of the organogel which have molar mass less than or equal to 2000 g·mol-1. Said agent includes at least one hydrogen bond donor group D, at least one hydrogen bond acceptor group A and at least one compatibility enhancing group C which makes the organogelling agent compatible with bitumen chemical compounds. Said agent makes up at least 0.1 wt % of the total weight of bitumen. The invention also relates to a method of producing and using these bituminous compositions in road construction, particularly in producing road binding substances, as well as in industry.

EFFECT: obtaining bitumens which are harder at application temperatures without increasing their viscosity in hot condition.

37 cl, 2 dwg, 14 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of producing granular foamed compositions based on vinyl aromatic compounds and can be used in making articles from foam plastic. The foamed composition contains a polymer matrix selected from a copolymer containing 90-99.995 wt % of at least one vinyl aromatic monomer and 0.005-10 wt % salt or C1-C4 alkyl ether of styrenesulphonic acid; or a polymer mixture containing 92-99.995 wt % vinyl aromatic (co)polymer and 0.005-8 wt % of a product selected from a salt or C1-C4 alkyl ether of styrenesulphonic acid and a copolymer of styrene and a salt or C1-C4 alkyl ether of styrenesulphonic acid; 1-10 wt % with respect to weight of the polymer matrix of the foamed additive selected from aliphatic or cycloaliphatic hydrocarbons containing 3-6 carbon atoms, or mixtures thereof, halogenated derivatives of aliphatic hydrocarbons containing 1-3 carbon atoms, and carbon dioxide. Foamed beads, foamed articles and methods of producing granular foamed compositions in an aqueous suspension or in a mass are also described.

EFFECT: obtaining foamed granules having low density and low electrostatic charge.

9 cl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing an asphalt modifier composition, involving: obtaining a triblock copolymer via block copolymerisation of a vinyl aromatic hydrocarbon and a diene compound with conjugated double bonds as a result of anionic polymerisation using an organic anionic initiator in a reactor, having a hydrocarbon solvent, where the step of producing the block copolymer involves: formation of a vinyl aromatic block by feeding a vinyl aromatic hydrocarbon into a reactor, having a hydrocarbon solvent, and then feeding an organic anionic initiator; forming a diene block with conjugated double bonds, bonded to the end of the vinyl aromatic block, by feeding a diene compound with conjugated double bonds into the reactor; feeding a functional additive, selected from a group consisting of compounds of formula 1, into the reactor; and obtaining an asphalt modifier composition, including a block copolymer and a functional additive, by removing a hydrocarbon solvent, Formula 1 ; in formula 1, the sum n+m-m' is equal to 35, n is an integer from 1 to 5, each of m and m' is an integer equal to at least 1, and X is an ester group [-C(=O)O-]. The invention also relates to a method of producing the asphalt modifier composition and asphalt composition.

EFFECT: asphalt modifier composition dissolves fast in asphalt without significantly reducing softening temperature of asphalt, which enables to obtain a homogeneous asphalt composition and increase effectiveness of the asphalt composition.

17 cl, 1 tbl, 4 ex

FIELD: organic chemistry, rubber industry.

SUBSTANCE: invention relates to a vulcanizing composition comprising rubber vulcanized with sulfur, sulfuric vulcanizing agent, accelerating agent taken among a group comprising of non-thiazolsulfenamide accelerating agents and agent providing stabilization of hardness that comprises derivative of pyrimidine of the formula (I):

wherein X represents hydrogen atom (H), radical from R1 to R4, NR3R4, OR5, SR5, SO2R6, M, (SO3)zM (wherein M represents metal ion); n and z can be similar or different and = 1, 2 or 3 depending on the corresponding valence of X and M = 1, 2 or 3; radicals from R1 to R4 are similar or different and taken among the group comprising of H, halogen atom, -OH, -NH2, alkyl, cycloalkyl, aryl, alkylaryl, alkylaryl, aralkyl and each among substitutes has optionally additional functional groups taken among the group consisting of -NH2, -OH, substituted amino-group, substituted hydroxyl, halogen atom and carbonyl-containing group; R3 and R4 in the same link in common with nitrogen atom (N) can form a heterocyclic group; R5 can mean any radical from R1 to R4 formed by carbon-base heterocyclic group comprising at least one sulfur (S) or nitrogen (N) atom or both S and N; R6 is taken among any radical from R1 to R4, -OH, -OM, -OR5, -NH2, NR3R4. The corresponding amount of accelerating agent and hardness stabilizing agent is effective in order to not inhibit vulcanization and to stabilize hardness property of indicated rubber after vulcanization. The amount of accelerating agent in indicated composition is above about 0.6 part per 100 parts of rubber when indicated rubber represents butadiene styrene rubber (SBR), and at least 0.5 part per 100 parts of rubber when indicated rubber represents the natural rubber, and the amount of the hardness stabilizing agent is at least about 0.5 part per 100 parts of rubber. Also, invention involves a method for enhancing hardness stabilization of the composition comprising rubber vulcanized with sulfur by addition of above indicated accelerating agents and pyrimidine derivative to the composition.

EFFECT: valuable properties of compounds.

28 cl, 8 tbl, 4 ex

The invention relates to the rubber industry

The invention relates to the composition for a bulkhead of a thin display panel, representing a group of monitors for display, such as a panel plasma and LCD indicators
Rubber mixture // 2550827

FIELD: chemistry.

SUBSTANCE: invention relates to rubber-technical industry, in particular to production of rubber mixtures for production of products of different target purpose, exploited under low temperature conditions. Rubber mixture contains, wt. p.: butadiene-nitrile caoutchouc - 100, dicumyl peroxide - 5-6, sulphur - 0.4-0.6, zinc oxide - 5.0-5.5, tetramethylthiuram disulphide - 0.3-0.4, technical carbon - 120-130, stearine - 1.0-1.5, dibutylsebacate - 18-20, diaphene IPPD - 3.0-3.5, naphthame-2 - 2.0-2.5, technological additive softener PC-1 - 1.0-1.5.

EFFECT: invention makes it possible to improve technical characteristics.

2 tbl

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